Riveting-machine



(No Model.) 0. E. SMITH.

RIVETING MACHINE.

Patented Oct. 29, 1895.

WI TNE SSE S: M

INVENTOI? a r I: I

UNITED STATES PATENT CHRISTIAN H. SMITH, OF LONDON, OHIO.

RlVETlNG-MACHINE.

SPECIFICATION fonning part of Letters Patent No. 548,668, dated October29, 1895. Application filed August 10, 1895- Serial llo. 558,932. (Nomodel.)

To all whom it may concern.-

Be it known that I, CHRISTIAN H. SMITH, of London, in the countyofMadison and State of Ohio, have invented an ImprovedRiveting-lliachine, of which the following is aspecification.

This invention is aniinproved riveting machine or punch, the objectbeing to provide a cheap and simple contrivance for tinners andsheet-metal workers whereby accuracy and rapidity of work isaccomplished.

Heretofore in riveting metal work, such as stovepipes and the like,great difficulty has been experienced in properly centering the punchover the rivet before the same is forced through the sheet metal. Myinvention obviates this objection; and it consists in the peculiarconstruction and combination of the various parts, as will be more fullydescribed hereinafter, and pointed out in the claim.

In the drawings forming a part of this specification, Figure 1 shows myimproved device attached to a mandrel employed by a tinner orsheet-metal worker, such view showing the punch in operative position.Fig. 2 is a similar view showing the punch raised to an inoperativeposition. Fig. 3 is a top plan view, and Fig. at is a detail view of therivet-punch.

In carrying out my invention I generally attach the same to the inner orrear end of an ordinary mandrel A. My improved attachment comprises afixed arm 13, which normally rests in a horizontal position a shortdistance above the mandrel, and at its rear end is bent downwardly, asat b, and rests between the ears 0 of a block 0, and passing throughsaid end and ears are the pins or bolts 0', which securely hold the armB within the block. The forward end of the arm lT is bifurcated orforked, as shown, the outer member D being somewhat shorter than thelower member D. Pivotally connected to the said members D and D are theparallel link members Eand E, which links are pivotally connected attheir forward ends to the lugs F and F, formed integral with therivetpnnch G, said punch having a recess 9 at its lower end and head g"at the upper end, and the lug or nose 9 upon the forward side near theupper end. The mandrel Ahasasimilar recess a near the forward end, whichis adapted to receive the head of the rivet and hold said rivet in anupright position, and when the punch is lowered, as shown in Fig. 1,said punch, with its recessed end, will rest directly over the rivetlocated in the recesses in the mandrel.

The sheet metal to be riveted is of course placed between the rivet andpunch before said punch is lowered, and by giving a sharp blow on thehead of the punch the riveting act can be quickly accomplished and notime will be lost. in centering the punch over the rivet, as thelink-arms. act as a gage and properly guide the punch directly over therivet. After the riveting operation has been accomplished the punch canbe raised by giving a sharp tap orblow upon the forwardly-projectingnose of the punch, and in order to hold the punch in an elevatedposition while arranging the rivet and sheet metal I provide thespring-arms H, which are attached to each side of the arm B just in rearof the fork, said arms being so shaped as to normally rest in contactwith each other, and at their forward ends are spread slightly apart inorder to permit the upper link E to readily pass therebetween; and aftersaid link has been passed between said spring-arms the force of thespring will be sufficient to hold the said link in such a position, andthus maintain the punch in an elevated position.

I have shown the spring-arms H as rightangled in shape, but any otherform could be used, provided the clamping-j aws thereof projectsufficiently forward to permitthe link to be passed therebetween.

Whenever it is desired to use the mandrel without my improved rivetingpunch or gage, another-devioecan be attached by removing the bolts D andwithdrawing the end of the arm 1;- from the block 0.

Having thus described my invention, what I claim, and desire to secureby Letters Patout, is-

The combination with the mandrel, of a block arranged thereon, havingparallel ears, the arm having its rear end secured in said block, theforward end of said arm being bifurcated, 'a link pivotally connected toeach member of the forward end, and punch, having lugs upon its rearside to which the links are pivotally connected, a nose upon its for- Intestimony whereof I affix my signature ward side, and the springactuated clamping in the presence of two witnesses. arms attached to thelink carrying arm, to

the rear of the bifurcation, said spring arms CHRISTIAN H. SMITH. 5being adapted to receive one of the links to Witnesses:

hold the punch in an elevated position, sub- M. S. MURRAY,

stantially as shown and described. ROSE MURRAY.

